Nice little springs!

I put these in a '66 FENDER Musicmaster II mutant that I acquired a ways back for its second pickup adjustment screws. Fit nicely into the close quarters musicmaster/ mustang route! Please note that someone else added the tele style bridge and a strat jack on the instrument before I bought it! Good springs!

Corkscrew springs are very good

There's definitely a case for using this style of pickup screw spring, making one end very stable by using the larger diameter end for the pickguard and the other for the pickup. After seeing the results, you could switch ends, if your particular situation called for it. The coiled springs that look like a ball-point pen spring bunch up and create weird side-pressures on your screw and can distort your pickup instead of keeping it parallel with your pickup. I keep both types, along with the small surgical tube style which I also like.

They serve their purpose

Making a custom project guitar, and using single-coil pickups (no-name cheapies in case of accidents) which came with no springs (made for direct mounting to the back of the pick-up cavity). Got some of the single-coil pickup rings and screws, and jammed these springs in between and they serve their purpose perfectly!